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Ultra low frequency electromagnetic fire alarm system for underground mines

Effect of ultralow frequency signaling on blasting array current

Published Year

• 1990-1999 (2)

Subject

• Fire alarms (2) *
• ELF electromagnetic fields (1)
• Electric detonators--Safety measures (1)
• Electromagnetic waves--Transmission (1)
• Mine fires--Prevention and control (1)

Author

• Hjelmstad, Kenneth E. (2) *
• Griffin, Russell E. (1)
• Pomroy, William H. (1)

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